Alternative mechanisms alter the emergent properties of self-organization in mussel beds.
Alternative mechanisms alter the emergent properties of self-organization in mussel beds.
复制标题
替代机制改变了贻贝床中自组织的新兴特性。
DOI：
10.1098/rspb.2012.0157
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发表时间：
2012-07-22
期刊：
影响因子：
--
通讯作者：
van de Koppel J
中科院分区：
文献类型：
--
作者：
Liu QX;Weerman EJ;Herman PM;Olff H;van de Koppel J
理论模型预测，空间自组织可以通过在弹性和生产力方面影响生态系统的功能，产生重要的、意想不到的影响。这些突现效应是否以及如何依赖于潜在机制的具体表述，是经常被忽视的问题。在这里，我们比较了两种不同的贻贝床中规则空间格局形成的替代模型，它们对贻贝之间的促进相互作用有不同的机械描述。第一种机制是由于贻贝之间的相互保护，在高密度下减少了贻贝的损失率，这是先前关于贻贝模式形成的研究的基础。第二种机制基于新的实验证据，假设贻贝在贻贝产生的隆起上更有效率地觅食。模型模拟指出，第二种机制在贻贝床上产生了非常相似的空间模式。然而，这些机制预测，这些空间模式在生产力和弹性方面对生态系统功能的影响截然不同。在第一个模型中，高贻贝密度降低贻贝损失率，预测模式将极大地提高生产力，并减少扰动后床层的恢复时间。当格局形成是通过增加对驼背栖动物的摄食效率而产生时，只预测到格局形成对生态系统功能的轻微紧急影响。我们的结果对空间自组织的含义和涌现特性的预测提出了警告，当支持自组织的机制不完全被理解并且不是基于实验研究时。
Theoretical models predict that spatial self-organization can have important, unexpected implications by affecting the functioning of ecosystems in terms of resilience and productivity. Whether and how these emergent effects depend on specific formulations of the underlying mechanisms are questions that are often ignored. Here, we compare two alternative models of regular spatial pattern formation in mussel beds that have different mechanistic descriptions of the facilitative interactions between mussels. The first mechanism involves a reduced mussel loss rate at high density owing to mutual protection between the mussels, which is the basis of prior studies on the pattern formation in mussels. The second mechanism assumes, based on novel experimental evidence, that mussels feed more efficiently on top of mussel-generated hummocks. Model simulations point out that the second mechanism produces very similar types of spatial patterns in mussel beds. Yet the mechanisms predict a strikingly contrasting effect of these spatial patterns on ecosystem functioning, in terms of productivity and resilience. In the first model, where high mussel densities reduce mussel loss rates, patterns are predicted to strongly increase productivity and decrease the recovery time of the bed following a disturbance. When pattern formation is generated by increased feeding efficiency on hummocks, only minor emergent effects of pattern formation on ecosystem functioning are predicted. Our results provide a warning against predictions of the implications and emergent properties of spatial self-organization, when the mechanisms that underlie self-organization are incompletely understood and not based on the experimental study.
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影响因子：
64.8
作者：
Kéfi, Sonia;Rietkerk, Max;de Ruiter, Peter C.
通讯作者：
de Ruiter, Peter C.
影响因子：
4.8
作者：
Jones, CG;Lawton, JH;Shachak, M
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1016/j.jembe.2008.07.006
发表时间：
2008-11-15
影响因子：
2
作者：
Anderson, Marti J.
通讯作者：
Anderson, Marti J.
影响因子：
56.9
作者：
Klausmeier, CA
通讯作者：
Klausmeier, CA